Improvement in steam-generators



` certain new and useful Improvements in the,Gon-` `struction of Steam-Generators-; and I do hereby cleclare that thefollowing is a full, clear, and exact'de To all 'whom it 'mu/y i,

academia Kiwi llink .'11( )NA'rHAN M. CLARK', or NE W YORK, yN. Y. i `Italia1mm Nb. 89,916, and Ma/y 11, i869.

. narnovmmm nre'rnAM-GENERATORS.

` s Be it knownthat I, J ONATHAN M. (lnnnmiot' the city, county, and State of New '.York, have invented scription thereof, reference being had to the accompanying drawing, through letters of reference marked thereon, making part of this specification, and in which Y Figure 1 taken on the line za: of tig..2, the tubes in 'ont of the section-line being shown in red-ink lines.

` r constructed according to myinvention.

` responding parte Figure 2 is an vend view and partial section, take Figure 3 is a section, taken on the line y y of fig. 1, generator showing the interior of on'e end-wall of a In the several figures', thesame letters indicate cor- This` invention maybe regarded as an improvement upon that for which Letters Patent wereI granted to me, bearing date September 8, 1868, and numbered 81,983; and w It consists kin an improved Inode of connecting the hollow,block1ike heads of the tubes which foim the end-walls of the boiler, in such manner that all bolts are dispensed with, and the `parts which form the passages for water and steam-communication between the several tubes ofthe series, and throughwhich a circu lation is kept up, are` made to serve, also, the purpose of bindingthe series together, to constitute the coml pleteboiler or generator, thus vmaterially simplifying its construction, and reducing its cost.

To enable others `to make and use my invention, V I will describe its construction and operation, by referring to the drawings, in whichf- A A represent the tubes, of which there may be done, two, or more, connected with and opening into the cavity of the hollow, block-like heads B at each end, which they may be screwed or riveted into; or

i the headsmaybe cast on to the tubes, as preferred'.

Theseheads are of rectangular or `parallelogrammic form, so that they maybe arranged in contact, to form 'a wall, and thus enclose the front and rear ends of the lire and- Hue-space.

The lower ranges are connected, 'each with the adjacent one, by a lateral pipe jor nipple, C, which may be represents` a verticallongitudinal section,

formed with a rightehand screw-thread on one end, and a lett-hand one' on the other, with corresponding feheads', any number of which may be thus connected, side by'sde, and upwardly, one `above another, vthe bottom and top rows, only, being connected laterally, to admit of a free circulation of water and steam. The tubular couplings may be variously applied.'A Instead'of as before described, they may be passed snugly through apertures in the heads, and secured by a nut, a, on: each end; or they may be riveted; .but the screw, in either form, is preferable tothe rivet, as, in case it is desirable to remove a single range or YsecrA readily accomplished.- g

` When the right andleft-hand screw is used, it is" necessary to form a ange, d, around theinner edges of theheads, so as to leave a space between their sides, to admit of the application of a pairof tongs, to'turn the nipple O with, by which, in case-of leakage at any of the screw-couplings, they may be tightened up, lwhen 'steam is on, without stopping lthe machinery; but, when thenipple O is fastened by nuts a inside -the heads, this llange is unnecessary.

" In the outer side or face of the heads B is formeda circular opening, c, of sufficient size to expose theI open ends of the tube' or tubes, A, connected with them,

'and to admit of' the introduction o'f a suitable instrument to remove scale or sediment that may have formed therein.`

These'openings are provided with screw-Stoppers,

D, which may be readily inserted or removed.

By this construction, all perishable packing is dispensed with. The screw-couplings, being of a tapering character, are self-tightening, as are also thestoppers D, so that the boiler may be much more cheaply manufactured, and be less liable to leakage than similarboilers heretofore made.

Having thus described my invention, What I claim as new, and desire vto secure by Letters Patent, is

The combination of the hollow, angular head B,

as described.,

' `J. M. CLARK.

Witnesses:

' F. B. DUNN,

W. Monnrs SMITH.

male-screw threads in the aperturesin the sides ofthe tion, with the head at each end, it can thereby be more Y i:tubular connecting-plug 0, andi-lange (l, substantially 

